摘要
本文对玉门炼油厂减压炉辐射室建立了半圆形圆筒炉传热的数学模型.管外采用Monte Carlo方法模拟辐射传热过程;管内采用改进的Soave模型计算渣油的相平衡.通过管内、外的综合传热计算,得到了辐射室内烟气的温度分布、管壁的温度分布和热强度分布,以及管内流体的温度、压强和汽化分率.计算应用重要抽样和能差迭代的概念,对Monte Carlo抽样进行了改进,缩短了计算时间.计算结果与实际操作数据进行了比较,证明该模型是可行的.
A mathematic model for heat transfer in the semi-cylindrical furnace for the vacuum tower of the crude unit in Yumen refinery has been established.The radiant heat transfer processes outside the pipes is modelled by using Monte Carlo method.The phase equilibrium of residue oil inside the pipes is calculated by the modified Soave Medel.The distribution of temperature of the flue gas,the profile of temperature and heat flux of the pipe wall in the radiant chamber,as well as the distribution of the temperature,pressure and evaporized fraction of the fluid in pipe are obtained by comprehensive heat transfer calculations.In order to shorten the calculation time,the iteration method of energy difference and the important random method are used for improving the Monte Carlo method.Comparison of the calculated results with the actual operation data confirms that the developed model is feasible.
出处
《石油学报（石油加工）》
EI
CAS
CSCD
北大核心
1990年第4期68-78,共11页
Acta Petrolei Sinica(Petroleum Processing Section)
基金
中国石化总公司重点科研资助项目
